What are the characteristics of ferromagnetic materials for transformers, cores, magnets, and permanent magnets?
Certain ferromagnetic substances are magnetized at once. Even after the removal of the external magnetic field, there is still a great residual magnetic induction. General non-ferrous metal materials are non ferromagnetic materials, that is, can not be magnetized material. Austenitic stainless steel inside stainless steel can not be magnetized, and other stainless steel material can be magnetized.
When ferromagnetic materials such as iron, steel, nickel and cobalt are not affected by an external magnetic field, the synthetic magnetic moment produced by their molecular currents is equal to zero at the macroscopic level and hence does not exhibit magnetism. When ferromagnetic materials are introduced into an external magnetic field, the process of the arrangement of the internal molecular magnetic moment is called magnetization under the action of an external magnetic field.
Magnetic or not is the difference between the ferromagnetic and non ferromagnetic material, also is to see whether the material can be a magnet adsorption.
